Essai de phytoclimatologie dynamique sur le nord du Portugal
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[1] Universidade de Lisboa
Universidade de Lisboa
Socorro, Portugal
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- Localización: Lagascalia, ISSN 0210-7708, Vol. 19, Nº 1-2, 1997, págs. 413-422
- Idioma: español
- Enlaces
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Resumen
For the first time in Portugal, the climate-vegetation relation is studied in a new way. The present approach integrates the atmospheric dynamics, climatic point data and the vegetation composition. The geographic relationships between the progressive changes in the perennial flora and the climatic variations are demonstrated. The climatic transitions can be located through the accelerations in the flora renewal, considered as the influence limits of atmospheric circulations of contrasted origin. The study was carried out in the north of Portugal because of the geologic uniformity (granites for the most part) and also because of the well defined climatic gradients. Vegetation and environmental samplings were made along a continous line transect and multivariate analysis and some of the applications of the information theory were used in the study of the many releves. For the climatic study, the daily values of precipitation and temperature as well as the atmospheric circulations were considered for a three years period. The types of atmospheric circulation (at ground level and in altitude) were defined and CCA showed the relationships between the daily precipitation data and the different aerological situations.
